I make a homemade milling router and i adjust motor tuning and everything and in jog mode everything works fine,but when i change to program mode and insert g-code motors are producing bad sound and dont work good, they are folowing the conture i adjust motor steps and the path is ok, but the sound of the motors isn't. What can be the cause of that?,pls help.

The Jog rate might be set at something less than 100%, Press the TAB key on the keyboard and make sure Jog is at 100% then retune your motors, making sure steps per are set correctly.

You can check movement with a Dial Clock and enter this code in MDI screen :-

Metric, Move 1mm from current position
G01 G91 X1. F25.

Inch, Move 50 thousands from current position
G01 G91 X.05 F1.